Aggregate stability in soils cultivated with eucalyptus
The objective of this work was to evaluate the aggregate stability of tropical soils under eucalyptus plantation and native vegetation, and assess the relationships between aggregate stability and some soil chemical and physical properties. Argisols, Cambisol, Latosols and Plinthosol within three eu...
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Published in | Pesquisa agropecuaria brasileira Vol. 46; no. 1; pp. 89 - 96 |
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Language | English |
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Embrapa Secretaria de Pesquisa e Desenvolvimento; Pesquisa Agropecuária Brasileira
01.01.2011
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Abstract | The objective of this work was to evaluate the aggregate stability of tropical soils under eucalyptus plantation and native vegetation, and assess the relationships between aggregate stability and some soil chemical and physical properties. Argisols, Cambisol, Latosols and Plinthosol within three eucalyptus-cultivated regions, in the states of Espírito Santo, Rio Grande do Sul and Minas Gerais, Brazil, were studied. For each region, soils under native vegetation were compared to those under minimum tillage with eucalyptus cultivation. The aggregate stability was measured using the high-energy moisture characteristic (HEMC) technique, i.e., the moisture release curve at very low suctions. This method compares the resistance of aggregates to slaking on a relative scale from zero to one. Thus, the aggregate stability from different soils and management practices can be directly compared. The aggregate stability ratio was greater than 50% for all soils, which shows that the aggregate stability index is high, both in eucalyptus and native vegetation areas. This suggests that soil management adopted for eucalyptus cultivation does not substantially modify this property. In these soils, the aggregate stability ratio does not show a good relationship with clay or soil organic matter contents. However, soil organic matter shows a positive relationship with clay content and cation exchange capacity.
O objetivo deste trabalho foi avaliar a estabilidade de agregados, em solos tropicais sob cultivo de eucalipto e vegetação nativa, e avaliar as relações entre a estabilidade de agregados e alguns atributos químicos e físicos do solo. Foram estudados Argissolos, Cambissolo, Latossolos e Plintossolo dentro de três regiões com cultivo de eucalipto, nos estados do Espírito Santo, Rio Grande do Sul e Minas Gerais. Para cada região, os solos com vegetação nativa foram comparados aos solos com preparo mínimo sob plantio de eucalipto. A estabilidade de agregados foi determinada por meio da técnica da curva característica da umidade em alta energia (HEMC), isto é, a curva de retenção de umidade na sucção muito baixa. Este método compara a resistência dos agregados à quebra em uma escala relativa de zero a um. Deste modo, a estabilidade de agregado em diferentes solos e práticas de manejo pode ser diretamente comparada. A razão de estabilidade de agregados foi maior que 50% em todos os solos estudados o que indica que o índice de estabilidade de agregados é alto tanto nas áreas com cultivo de eucalipto quanto naquelas com vegetação nativa. Isto sugere que o manejo do solo adotado para o eucalipto não modifica substancialmente este atributo. Nesses solos, a razão de estabilidade de agregados não mostra boa correlação com o conteúdo de argila ou de matéria orgânica. Entretanto, a matéria orgânica do solo mostra uma positiva correlação com o conteúdo de argila e com a capacidade de troca de cátion. |
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AbstractList | The objective of this work was to evaluate the aggregate stability of tropical soils under eucalyptus plantation and native vegetation, and assess the relationships between aggregate stability and some soil chemical and physical properties. Argisols, Cambisol, Latosols and Plinthosol within three eucalyptus-cultivated regions, in the states of Espírito Santo, Rio Grande do Sul and Minas Gerais, Brazil, were studied. For each region, soils under native vegetation were compared to those under minimum tillage with eucalyptus cultivation. The aggregate stability was measured using the high-energy moisture characteristic (HEMC) technique, i.e., the moisture release curve at very low suctions. This method compares the resistance of aggregates to slaking on a relative scale from zero to one. Thus, the aggregate stability from different soils and management practices can be directly compared. The aggregate stability ratio was greater than 50% for all soils, which shows that the aggregate stability index is high, both in eucalyptus and native vegetation areas. This suggests that soil management adopted for eucalyptus cultivation does not substantially modify this property. In these soils, the aggregate stability ratio does not show a good relationship with clay or soil organic matter contents. However, soil organic matter shows a positive relationship with clay content and cation exchange capacity.
O objetivo deste trabalho foi avaliar a estabilidade de agregados, em solos tropicais sob cultivo de eucalipto e vegetação nativa, e avaliar as relações entre a estabilidade de agregados e alguns atributos químicos e físicos do solo. Foram estudados Argissolos, Cambissolo, Latossolos e Plintossolo dentro de três regiões com cultivo de eucalipto, nos estados do Espírito Santo, Rio Grande do Sul e Minas Gerais. Para cada região, os solos com vegetação nativa foram comparados aos solos com preparo mínimo sob plantio de eucalipto. A estabilidade de agregados foi determinada por meio da técnica da curva característica da umidade em alta energia (HEMC), isto é, a curva de retenção de umidade na sucção muito baixa. Este método compara a resistência dos agregados à quebra em uma escala relativa de zero a um. Deste modo, a estabilidade de agregado em diferentes solos e práticas de manejo pode ser diretamente comparada. A razão de estabilidade de agregados foi maior que 50% em todos os solos estudados o que indica que o índice de estabilidade de agregados é alto tanto nas áreas com cultivo de eucalipto quanto naquelas com vegetação nativa. Isto sugere que o manejo do solo adotado para o eucalipto não modifica substancialmente este atributo. Nesses solos, a razão de estabilidade de agregados não mostra boa correlação com o conteúdo de argila ou de matéria orgânica. Entretanto, a matéria orgânica do solo mostra uma positiva correlação com o conteúdo de argila e com a capacidade de troca de cátion. The objective of this work was to evaluate the aggregate stability of tropical soils under eucalyptus plantation and native vegetation, and assess the relationships between aggregate stability and some soil chemical and physical properties. Argisols, Cambisol, Latosols and Plinthosol within three eucalyptus-cultivated regions, in the states of Espírito Santo, Rio Grande do Sul and Minas Gerais, Brazil, were studied. For each region, soils under native vegetation were compared to those under minimum tillage with eucalyptus cultivation. The aggregate stability was measured using the high-energy moisture characteristic (HEMC) technique, i.e., the moisture release curve at very low suctions. This method compares the resistance of aggregates to slaking on a relative scale from zero to one. Thus, the aggregate stability from different soils and management practices can be directly compared. The aggregate stability ratio was greater than 50% for all soils, which shows that the aggregate stability index is high, both in eucalyptus and native vegetation areas. This suggests that soil management adopted for eucalyptus cultivation does not substantially modify this property. In these soils, the aggregate stability ratio does not show a good relationship with clay or soil organic matter contents. However, soil organic matter shows a positive relationship with clay content and cation exchange capacity. |
Author | Avanzi, Junior Cesar Norton, Lloyd Darrell Silva, Marx Leandro Naves Silva, Mayesse Aparecida da Curi, Nilton Oliveira, Anna Hoffmann |
AuthorAffiliation | United States Department of Agriculture Universidade Federal de Lavras Embrapa Pesca e Aquicultura |
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CitedBy_id | crossref_primary_10_1590_S0100_06832014000500028 crossref_primary_10_1007_s10333_021_00844_9 crossref_primary_10_1590_0103_9016_2014_0244 crossref_primary_10_1016_j_geoderma_2021_115104 crossref_primary_10_1016_j_geoderma_2019_113919 |
Cites_doi | 10.2136/sssaj2009.0279 10.1111/j.1365-2389.2004.00682.x 10.1016/S0167-1987(02)00115-0 10.2136/sssaj1997.03615995006100040024x 10.1097/00010694-199409000-00001 10.2136/sssaj2004.1992 10.1097/00010694-199910000-00007 10.2136/sssaj1989.03615995005300060035x 10.1016/S0016-7061(96)00047-X 10.2136/sssaj2000.642681x 10.1097/01.ss.0000085050.25696.52 10.2136/sssaj1997.03615995006100030036x 10.2136/sssaj2005.0285 10.1590/S0100-06831999000300004 10.2136/sssaj2002.1603 10.2136/sssaj1996.03615995006000040020x 10.2136/sssaj2000.6431042x |
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Keywords | tropical soils sistemas florestais Eucalyptus sp solos tropicais forest systems high-energy moisture characteristic curve curva característica de umidade em alta energia |
Language | English |
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SubjectTerms | AGRICULTURE, DAIRY & ANIMAL SCIENCE AGRICULTURE, MULTIDISCIPLINARY curva característica de umidade em alta energia Eucalyptus sp sistemas florestais solos tropicais |
Title | Aggregate stability in soils cultivated with eucalyptus |
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